2021021011002 has 64 divisors (see below), whose sum is σ = 4693107492864. Its totient is φ = 568260463680.

The previous prime is 2021021010947. The next prime is 2021021011057. The reversal of 2021021011002 is 2001101201202.

It is an interprime number because it is at equal distance from previous prime (2021021010947) and next prime (2021021011057).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1011648 + ... + 2250660.

It is an arithmetic number, because the mean of its divisors is an integer number (73329804576).

Almost surely, 2^{2021021011002} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2021021011002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2346553746432).

2021021011002 is an abundant number, since it is smaller than the sum of its proper divisors (2672086481862).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2021021011002 is a wasteful number, since it uses less digits than its factorization.

2021021011002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239643.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 2021021011002 its reverse (2001101201202), we get a palindrome (4022122212204).

The spelling of 2021021011002 in words is "two trillion, twenty-one billion, twenty-one million, eleven thousand, two".